Rid your closet of those bridesmaid dresses you’ll never wear again — trust me, you won’t — and bring them to Blue Martini tonight. They will be put on display and the owner of the dress that stands out the most will win a $100 Blue Martini gift card and a pair of tickets to see Britney Spears on July 20 at the Amway Center. Two runners-up also will win Britney tickets. The dresses will be donated to Goodwill. The first 50 women to arrive will receive two tickets to a special Tuesday screening of the movie “Bridesmaids” with MIX 105.1 FM. And because the party is during happy hour, everything is half off. (Pictured: Kristen Wiig, Maya Rudolph, Wendi McLendon-Covey, Rose Byrne, Melissa McCarthy and Ellie Kemper in a scene from “Bridesmaids.”)